CN100418384C - Multi-carrier base station amplifier - Google Patents
Multi-carrier base station amplifier Download PDFInfo
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- CN100418384C CN100418384C CNB2005100222332A CN200510022233A CN100418384C CN 100418384 C CN100418384 C CN 100418384C CN B2005100222332 A CNB2005100222332 A CN B2005100222332A CN 200510022233 A CN200510022233 A CN 200510022233A CN 100418384 C CN100418384 C CN 100418384C
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- power amplifier
- base station
- signal
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- power
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The present invention discloses a multi-carrier base station amplifier. The present invention comprises an input end, an output end and a linear power amplifier, wherein the input end is externally connected with a multi-carrier output interface of a base station cabinet; the linear power amplifier amplifies inputted multiway mixing carrier signals, and the output end outputs the amplified composite signals to a tower top amplifier or an antenna of a base station through a cable. The present invention has the beneficial technical effects that the linear power amplifier is directly used for amplifying multi-carrier transmitting signals outputted by the base station, the linear power amplifier can be directly connected with a down output opening of the base station cabinet, and harmful influences for the interior of the base station can be avoided; meanwhile, the multi-carrier signals do not need to be shunted and combined, power loss is greatly decreased, the complicated degree of a system is reduced, and the present invention is easy to install and maintain.
Description
Technical field
The present invention relates to mobile communication network equipment, be specifically related to a kind of multi-carrier base station.
Background technology
Along with the user to the increase of mobile communication demand and raising that network quality is required, mobile operator is striving for " seamless covering ", the method that generally can take to increase the base station and install the repeater additional, but increasing the base station has high input, low in user density, the regional utilance that telephone traffic is little is low, the channel resource waste; Adopt the repeater, can only solve local problem, and cause self-excitation, interference easily, reduce network running quality.Base station becomes the effective means of extended base station range in the zone that area is wide in that user density is relatively low.
Base station is the earliest described and is seen patent No. CN01257953.X, its advantage is that the input downstream signal of base station directly inserts from the descending delivery outlet of base station, simple in structure, line clear, but find in the use because cavity splitter and mixer have been used in base station inside, the signal of the different frequency harmonic shock cavity by different frequency is come separately, the signal of each different frequency uses independent power amplifier to amplify, with the cavity mixer signal of different frequency is closed the road to together again, can realize multi-carrier signal is amplified, and because the signal of each different frequency adopts independent power amplifier, therefore linear less demanding to the power amplification equipment, as long as the isolation of cavity splitter and mixer is enough high, intermodulation (intermodulation) clutter that just can guarantee its output signal can meet the demands, but it has a fatal shortcoming, because the frequency of cavity is immutable, so when the frequency change of base station, just must change cavity splitter and mixer, even adopt the cavity splitter and the mixer of frequency adjustable, its operation and maintenance cost is very high, and do not support the opening base station frequency hopping, so this product is difficult on the market and applies.
In order to solve the problem that base station that patent No. CN01257953.X describes exists, the patent No. is the base station that the utility model patent of CN03236085.1 and utility model patent that the patent No. is CN200320114982.4 have been described other form, be the mode that adopts a power amplifier of each carrier wave, as shown in Figure 1.TX1 and TX2 are for transmitting among Fig. 1, and RX is a received signal; PA1 and PA2 are amplifier, are used for amplifying transmitting; S is a duplexer, is used for launching before and after the amplifier shunt and merging with received signal; Charger provides power supply for the tower amplifier that links to each other with it.The characteristics of said structure are that the input signal of base station is that carrier-fequency generator TRU back from inside of base station connects signal, owing to do not adopt cavity splitter and mixer, amplifier is the broadband, can support frequency hopping, base station frequency changes also unaffected, linear technique to power amplifier requires also lower, as long as generally have-third order intermodulation of 45dBc just can satisfy the requirement of most of communication system, particularly to gsm system, power amplifier as long as-third order intermodulation of 26dBc just can satisfy the requirement of system.But its shortcoming is a power amplifier can only amplify one road carrier wave (See Figure one), so input signal must connect signal from the TRU back of inside of base station, causes wiring too many, and influences the internal structure of base station, destroys the reliability of system, as shown in Figure 2.
Summary of the invention
The above-mentioned defective that the objective of the invention is to overcome existing scheme provides a kind of flexible and convenient to use, the multi-carrier base station that can simplify installation and maintenance.
In order to achieve the above object, the technical solution used in the present invention is: a kind of multi-carrier base station, comprise input, output and linear power amplifier, described input is by the multicarrier output interface of the external base station of cable rack, described linear power amplifier amplifies the multichannel mixed carrier signal of input, and the mixed signal after described output will amplify exports the tower amplifier or the antenna of base station to; Described linear power amplifier comprises power divider, main power amplifier and from power amplifier, described power divider be used for will input multichannel mixed carrier signal be divided into that two-way outputs to main power amplifier and from power amplifier, described main power amplifier is used to amplify the multichannel mixed carrier signal of input, describedly is used for producing the intermodulation signal that the intermodulation signal of the multichannel mixed carrier signal that amplifies with main power amplifier offsets and outputs to main power amplifier from power amplifier.
Wherein, described main power amplifier comprises power amplifying transistor D, power coupler F and power coupler J; Describedly comprise phase shifter B, amplitude modulator C, signal synthesizer, phase shifter G, amplitude modulator H and power amplifying transistor I from power amplifier; After the multichannel mixed carrier signal of input was divided into two-way output by power divider, the one tunnel successively through amplifier transistor D, power coupler F and power coupler J output, and also be coupled to signal synthesizer after through power coupler F; Another road outputs to power coupler J through phase shifter B, amplitude modulator C, signal synthesizer, phase shifter G, amplitude modulator H and power amplifying transistor I successively.
For adapting to the base station of some uplink downlink shared interface, above-mentioned multi-carrier base station also can comprise two duplexers, the terminal of closing of two duplexers is connected with output with described input respectively, described linear power amplifier is connected between a pair of minute terminal of two duplexers, and another of two duplexers is connected to a minute terminal; The multichannel mixed carrier signal of emission amplifies the back through input by the linear power amplifier between a pair of minute terminal that is connected two duplexers and arrives output, received signal be connected by two duplexers through output another to a minute terminal arrival input.
Duplexer in the said structure can also replace with circulator and filter, promptly adopt two three terminal circulators and two filters, the a pair of port of two circulators is connected with output with described input respectively, described linear power amplifier be connected two circulators behind filter of its output series connection another to port between, the 3rd pair of port of two circulators is connected by another filter; The multichannel mixed carrier signal of emission arrives output after input is amplified by the linear power amplifier between a pair of port that is connected two circulators, received signal arrives input by two circulators by a pair of port that filter is connected through output
Preferably, also comprise D.C. regulated power supply and two by-pass switches, described D.C. regulated power supply is connected with described linear power amplifier and is its power supply, described two by-pass switches are connected with output with described input respectively, two by-pass switches are connected by cable, and described input can directly carry out signal with output by two by-pass switches to be transmitted.
Preferably, also comprise the adjustable signal attenuator, be connected between described input and the described linear power amplifier, the intensity of input signal is regulated.
In order to ensure carrying out satisfying the requirement for restriction of system when multicarrier mixes amplification to clutter, crosstalk had for example adopted feed-forward technique and pre-distortion technology etc. to improve the predistortion amplifier or the feed-forward amplifier of the technology of intermodulation less than the power amplifier of-50dBc when described linear power amplifier was chosen under the setting power work.
Adopt technique scheme, beneficial technical effects of the present invention is: the multicarrier that adopts linear power amplifier directly the base station to be exported transmits and amplifies, can directly be connected, avoid inside of base station is caused harmful effect with the descending delivery outlet of base station rack.Simultaneously needn't carry out shunt and close the road, significantly reduce power loss, reduce the system complex degree, be easier to installation and maintenance multi-carrier signal.
Also the present invention is described in further detail in conjunction with the accompanying drawings below by embodiment.
Description of drawings
Fig. 1 is the electrical block diagram of existing a kind of base station.
Fig. 2 is base station and a base station connection diagram among Fig. 1.
Fig. 3 is a kind of multi-carrier base station electrical block diagram of the present invention.
Fig. 4 is multi-carrier base station and a base station connection diagram among Fig. 3.
Fig. 5 is a kind of linear power amplifier electrical block diagram.
Fig. 6 is another kind of multi-carrier base station electrical block diagram of the present invention.
Fig. 7 is multi-carrier base station and a base station connection diagram among Fig. 6.
Fig. 8 is a kind of alternative electrical block diagram of Fig. 6.
Embodiment
Embodiment one, a kind of multi-carrier base station, circuit structure are applicable to emission (TX) and receive the base station that (RX) signal has interface respectively as shown in Figure 3.Comprise input, output and linear power amplifier SLPA, the TX interface of the external base station of described input rack, (i=1～N) is the N road carrier signal of base station output to Txi; SLPA amplifies the N road mixed carrier signal of input, and the mixed signal after described output will amplify exports the tower amplifier of base station to and launches through antenna.
The connection diagram of above-mentioned multi-carrier base station and respective type base station as shown in Figure 4.The SLPA that is adopted in this multi-carrier base station be when under setting power, working crosstalk less than the power amplifier of-50dBc, specifically can adopt the predistortion feed-forward amplifier with structure shown in Figure 5: input signal is divided into two-way by power divider A after the predistortion Nonlinear Processing, one the tunnel through power amplifying transistor D amplification, amplifying signal comprises the mixed signal that intermodulation (intermodulation) signal that the frequency of the frequency linearity amplifying signal of input and input produces forms, this mixed signal ingoing power coupling device F is further divided into two-way, one tunnel entering signal synthesizer E, other one the tunnel outputs to power coupling device J.Other one road signal that power divider A is divided into is through phase shifter B, amplitude modulator C entering signal synthesizer E, by regulating phase shifter B, amplitude modulator C makes the two paths of signals phase place of entering signal synthesizer E opposite, amplitude equates, because it is very little or do not have from intermodulation (intermodulation) signal of the signal of amplitude modulator C entering signal synthesizer E, therefore after the two paths of signals of entering signal synthesizer E synthesizes, main signal is cancelled each other, remaining had only intermodulation (intermodulation) signal that comprises from the signal the inside that power coupling device F comes, this signal enters phase shifter G, amplitude modulator H is after power amplifying transistor I amplifies, ingoing power coupling device J, synthetic with the signal that comes from power coupling device F, by regulating phase shifter G, amplitude modulator H cancels out each other two-way intermodulation (intermodulation) the signal amplitude equal phase of ingoing power coupling device J on the contrary, therefore intermodulation (intermodulation) signal from the signal the inside that power coupling device J exports just reduces greatly, thereby reaches the purpose of improving intermodulation (intermodulation).Can be called main power amplifier to the circuit of power amplifying transistor D, the circuit of power amplifying transistor I is called from power amplifier.The effect of whole SLPA circuit is exactly to amplify the multi-frequency carrier signal that input is brought in, and the intermodulation of output signal (intermodulation) signal is through offsetting and do not export, thereby reaches the purpose of improving power amplifier intermodulation (intermodulation) performance.
Embodiment two, another kind of multi-carrier base station, circuit structure are applicable to emission (TX) and receive the base station that (RX) signal uses same-interface as shown in Figure 6.Comprise input, output, linear power amplifier SLPA, duplexer a, duplexer b, D.C. regulated power supply (not drawing in the drawings), by-pass switch c, by-pass switch f, adjustable signal attenuator e.The TX/RX interface of the external base station of described input rack, (i=1～N) is the N road carrier signal of base station output to Txi; The terminal of closing of duplexer a, b is connected with output with input by by-pass switch c, f respectively, and SLPA is connected between a pair of minute terminal of duplexer a, b, and another of duplexer a, b directly links to each other to minute terminal; By-pass switch c, f are connected by cable; Adjustable signal attenuator e is connected closing between terminal and the by-pass switch c of duplexer a; D.C. regulated power supply is connected with SLPA and is its power supply.
Use in this example with embodiment one in identical SLPA, and in order to use with easy for installation, the charger g that tower is put also is integrated in the base station with another RX uplink receiving channel; Be that charger g powers to tower amplifier by the output of base station, base station also provides a pair of RX input/output interface.The connection diagram of above-mentioned multi-carrier base station and respective type base station as shown in Figure 7.The purpose that duplexer is set is to penetrate and received signal in order to develop in the amplification time-division, the N road mixed carrier signal TX1～TXN of emission amplifies the back through input by the SLPA between a pair of minute terminal that is connected two duplexers and arrives output, received signal RX be connected by two duplexers through output another to a minute terminal arrival input.Two by-pass switches then can have a power failure or base station out of order the time by-passing signal base station signal can directly be passed through, avoid the normal transmission and the reception of base station are exerted an influence.The adjustable signal attenuator can be regulated the gain of base station, reaches the purpose of flexible control, can avoid the too high base station that causes of power to be burnt.
Also available in the above-described embodiments circulator and filter substitute duplexer, (omitted the charger that by-pass switch, attenuator and tower are put among the figure) as shown in Figure 8, circulator is arranged on original duplexer position, and, can play the same separately emission and the effect of received signal respectively on the up RX link between two circulators and between the amplification of SLPA output and the circulator that is connected filter being set respectively.
Claims (5)
1. multi-carrier base station, comprise input and output, it is characterized in that: also comprise linear power amplifier, described input is by the multicarrier output interface of the external base station of cable rack, described linear power amplifier amplifies the multichannel mixed carrier signal of input, and the mixed signal after described output will amplify exports the tower amplifier or the antenna of base station to; Described linear power amplifier comprises power divider, main power amplifier and from power amplifier, described power divider be used for will input multichannel mixed carrier signal be divided into that two-way outputs to main power amplifier and from power amplifier, described main power amplifier is used to amplify the multichannel mixed carrier signal of input, describedly is used for producing the intermodulation signal that the intermodulation signal of the multichannel mixed carrier signal that amplifies with main power amplifier offsets and outputs to main power amplifier from power amplifier; Also comprise two three terminal circulators and two filters, the a pair of port of two circulators is connected with output with described input respectively, described linear power amplifier be connected two circulators behind filter of its output series connection another to port between, the 3rd pair of port of two circulators is connected by another filter; The multichannel mixed carrier signal of emission arrives output after input is amplified by the linear power amplifier between a pair of port that is connected two circulators, received signal arrives input by two circulators by a pair of port that filter is connected through output; Also comprise D.C. regulated power supply and two by-pass switches, described D.C. regulated power supply is connected with described linear power amplifier and is its power supply, described two by-pass switches are connected with output with described input respectively, two by-pass switches are connected by cable, and described input can directly carry out signal with output by two by-pass switches to be transmitted.
2. multi-carrier base station according to claim 1 is characterized in that: described linear power amplifier be when under setting power, working crosstalk less than the power amplifier of-50dBc.
3. multi-carrier base station according to claim 2 is characterized in that, described main power amplifier comprises power amplifying transistor (D), power coupler (F) and power coupler (J); Describedly comprise phase shifter (B), amplitude modulator (C), signal synthesizer, phase shifter (G), amplitude modulator (H) and power amplifying transistor (I) from power amplifier; After the multichannel mixed carrier signal of input was divided into two-way output by power divider, the one tunnel passed through amplifier transistor (D), power coupler (F) and power coupler (J) output successively, and also is coupled to signal synthesizer after through power coupler (F); Another road is passed through phase shifter (B), amplitude modulator (C), signal synthesizer, phase shifter (G), amplitude modulator (H) and power amplifying transistor (I) successively and is outputed to power coupler (J).
4. according to the arbitrary described multi-carrier base station of claim 1 to 3, it is characterized in that: also comprise the adjustable signal attenuator, be connected between described input and the described linear power amplifier, the intensity of input signal is regulated.
5. multi-carrier base station according to claim 4 is characterized in that: described linear power amplifier is predistortion or feed-forward amplifier.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100222332A CN100418384C (en) | 2005-11-30 | 2005-11-30 | Multi-carrier base station amplifier |
| HK06112500.2A HK1090790A1 (en) | 2005-11-30 | 2006-11-14 | Amplifiers for multicarrier base station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100222332A CN100418384C (en) | 2005-11-30 | 2005-11-30 | Multi-carrier base station amplifier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1801974A CN1801974A (en) | 2006-07-12 |
| CN100418384C true CN100418384C (en) | 2008-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100222332A Expired - Fee Related CN100418384C (en) | 2005-11-30 | 2005-11-30 | Multi-carrier base station amplifier |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN100418384C (en) |
| HK (1) | HK1090790A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2101541A1 (en) | 2008-03-14 | 2009-09-16 | Vodafone Group PLC | Radio head for roads or rurual environments |
| CN102244943B (en) * | 2011-07-25 | 2013-08-28 | 成都芯通科技股份有限公司 | Low-noise-amplifier bypass system in multi-carrier base station amplifier and control method thereof |
| CN104639216B (en) * | 2013-11-07 | 2018-12-04 | 中国移动通信集团设计院有限公司 | A kind of electrical tilt antenna |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6169451B1 (en) * | 1997-12-27 | 2001-01-02 | Lg Information & Communications Ltd. | System for sensing operating state of tower top amplifier for mobile communication system and method of sensing the same |
| CN1282452A (en) * | 1997-10-21 | 2001-01-31 | 因特威夫通讯有限公司 | Self-contained masthead units for cellular communication networks |
| EP1124334A1 (en) * | 2000-02-10 | 2001-08-16 | Siemens Aktiengesellschaft | Radio station for transmitting and receiving radio signals |
| CN1390063A (en) * | 2001-05-31 | 2003-01-08 | 深圳市中兴通讯股份有限公司上海第二研究所 | Linear power amplification method and power amplifier unit based on feedforward technique |
| CN2624561Y (en) * | 2003-01-20 | 2004-07-07 | 王晓鹏 | Base station power amplifier |
| CN2624560Y (en) * | 2003-06-13 | 2004-07-07 | 查海平 | PHS mobile communication direct amplifying station |
| CN2652064Y (en) * | 2003-10-27 | 2004-10-27 | 李学军 | Separated bi-directional base station power amplifier |
| CN1684531A (en) * | 2004-04-13 | 2005-10-19 | 徐平 | GSM/CDMA two-way duplex tower top amplifier |
| CN2862541Y (en) * | 2005-11-30 | 2007-01-24 | 李学军 | Multiple carrier base station amplifier |
-
2005
- 2005-11-30 CN CNB2005100222332A patent/CN100418384C/en not_active Expired - Fee Related
-
2006
- 2006-11-14 HK HK06112500.2A patent/HK1090790A1/en not_active IP Right Cessation
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1282452A (en) * | 1997-10-21 | 2001-01-31 | 因特威夫通讯有限公司 | Self-contained masthead units for cellular communication networks |
| US6169451B1 (en) * | 1997-12-27 | 2001-01-02 | Lg Information & Communications Ltd. | System for sensing operating state of tower top amplifier for mobile communication system and method of sensing the same |
| EP1124334A1 (en) * | 2000-02-10 | 2001-08-16 | Siemens Aktiengesellschaft | Radio station for transmitting and receiving radio signals |
| CN1390063A (en) * | 2001-05-31 | 2003-01-08 | 深圳市中兴通讯股份有限公司上海第二研究所 | Linear power amplification method and power amplifier unit based on feedforward technique |
| CN2624561Y (en) * | 2003-01-20 | 2004-07-07 | 王晓鹏 | Base station power amplifier |
| CN2624560Y (en) * | 2003-06-13 | 2004-07-07 | 查海平 | PHS mobile communication direct amplifying station |
| CN2652064Y (en) * | 2003-10-27 | 2004-10-27 | 李学军 | Separated bi-directional base station power amplifier |
| CN1684531A (en) * | 2004-04-13 | 2005-10-19 | 徐平 | GSM/CDMA two-way duplex tower top amplifier |
| CN2862541Y (en) * | 2005-11-30 | 2007-01-24 | 李学军 | Multiple carrier base station amplifier |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1801974A (en) | 2006-07-12 |
| HK1090790A1 (en) | 2006-12-29 |
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